Gas-lamp.



&. WEDDEBJBUM;

' GAS LAMP.

APPLICATION FILED NOV. 28, 1909.

989,092. Patenteq Apr. 11, 1911.

WITNESSES: IIVVENTOR Z Jaw which the following is a specification.

mantles without increasing the -amount 0 vention. The end desired isattained by di- UniTEn STATES GEORGE WEDDERBURN,

or VIENNA, vmemra.

GAS-LAMP.

Specification of Letters Patent.

Application filed November 29, 1909.

Patented Apr. 11, 1911..

Serial No. 530,297.

To all whom it may concern:

Be it known that L Gr'rono'n \VEDDERBURN, a citizen of-the UnitedStates, residing at Vienna, in the county of Fairfax and StateofVirgiuia. have invented certain new and useful Improvements inGas-Lamps, of

This invention refers to gas lamps of the inverted are type andparticularly to the means used for increasing the brilliancy or candlepower of the gas mantles.

In the common form. of gas lampsof the inverted type wherein animperforate globe is usually employed, the air supply is not directed tothe immediate zone of combustion .where the mantles are incandescing insuch a way as to developthe maximum-of brilliancy or candle power, whichthey are. capable of developing under a given gas supply. 1

To increase the brilliancy of incandesoin gas consui'ned is theobject'of the present inrecting the air supply below the mantlesand' tothe Bunsen mixer or barriers in such a way that a proper mixture ofheated air and gas is effected in the mixer and a fresh supply of air isbrought. to the mantles and flu-me in a strong upward stream. In thismanner abundant orq'gen is furnished the incundescing mantles withintheimmediate zone of combustion. The circulation of inflowing air andout-fiowin gases thereby induced assists in the e cient exhaust ofluirned air and gas.

Another object of the invention is to provide improved means forremovably holding the outer cylinder on the supply pipe.

A still further object of the invention is to provide asimple gas valvecomprising a needle valve working against a suitable sout and with. aositive action controlled-by a key operated pinion.

With the almve and other objects in view the invention consists incertain combinations, constructions and' arrangements of parts, clearlyillustrated in the accompanying drawings, in which, f

Figure 1 is a vertical sectional view of the lamp, Fig. 2 is a detailperspective view of a transparent air directing sleeve, Fig. 3 is f adetail view of a latch, and Fig. 4 is a def tail vertical sectional viewof the controlling I valve, and Fig. 5 is a detail transverse sectionalview thereof. l

Referring to the accompanying drawings which illustrate the invention 1denotes a cylinder which is open at both ends and which is provided withan ornamental head piece 2,-suitably attached to the upper end thereof.On the lower end of the cylinder 1 a number of latch devices 3 arepivotally supported'and each of these latch devices is provided with apill 4, projecting through the wall of the cylinder. The pins 4removably hold four cross arms 5, the ends of which are provided withsockets for the re ception of-said pins. The lower ends of the latchdevices are'bent outwardly so that they can be easily manipulated. I

the tubes 7 incandescent mantles 8 are' secured, so as to be below theplane of the lower end of the cylinder 1. A Bunseii mixer 9 is securedto the cross arms 5 so as to communicate with the tubes 7, and extendsvertically above the arms 5. The upper end of the mixer 9 is connectedto the gas supply pipe 11. With the cylinder lan air inlet tube 12 isarranged. The upper end of this pi or tube is flared so as to form awide air intake. This u per A mantle holding device consisting of arms 6and depending tubes 7, is fixed to the cross arms '5, and onthe lowerends of end is disposed above the upper endo the 4 r cylinder so as notto obstructthe flow of gases. Thelower end of the'intake pipe or tube 12is contracted to snugly fit around the casing of the mixer 9,.to whichit is suitably secured, as by a screw 13.

The valve casing 10 is formed with vertical guideways adapted to guidearack 14, which is provided on its lower end with a needle valve 15,adapted to close an opening 16in the bottom wall of said valve casing.The valve rack 14 is operated by a pinion 17 secured on a shaft 18,which is provided with a removable key 19, which key extends through thecylinder 1. Aslight turn of the pinion 17 will lift the valve 15 fromits seat or opening 16, or place it in a closing position against saidseat or opening. This improved valve afiords an easy and sure controlover the flow of gas and is always positive in operation.

Above the valve casing 10 a valve casing 20 is secured to the pipe 11,which casing is provided with an operating arm 21, of the usual nature.A pilot tube 22 is connected to the casing above the valve therein andis provided with a screw 23 for regulating the flow of gastherethrou'gh. This pilot tube or pipe is passed through the upper endof the 1ntake tube and terminates in a burner or ]et 24:, which is heldnear the mantles 8,

so that'the same can be brought to incandescence without a match, as inthe ordinary construction. The arm 21- is provided with suitable chainsor other means for operating the same.

On the lower end of the cylinder 1 a globe support 25 is secured at 26.This globe support isflared downwardly and outwardly of the cylinder sothat-a spaceis formed be tween the lower end thereofland the adjacentportion of the cylinder. The flared lower end'of 'the globe support 25is pro I the inlet openings 27 to the imme iate zone vof combustion orto the lower part of the mantles, so that a positive upward current offresh air'will be created at this point, an air directing sleeve 31 isslidably secured, being frictionally held in place, to the lower end ofthe cylinder 1. This sleeve is made of mica, lass or other suitable heatresist- .ing material of a transparent nature, and is provided with handholds 32, whereby the same may be adjusted on the cylinder 1. The bestresults are secured by arranging the lower end of the sleeve 31 belowthe lower tips of the mantles, as shown in Fig. 1,

When gas is supplied to the mantles by opening the upper valve and saidgas is ignited so that themant-les will be brought to a state ofincandescence, an increased amount of candle power or brilliancy will bedeveloped in the mantles. Thewide air intake pipe or tube 12 will permitan abundance of air to be conveyed to the Bunsen mixer 9,

without resistance, and the air'in passing through said tube or pipe 12will be effectively heated by'the gases rising'm the cylinder 1, fromthe mantles 8, so that the illuminating power of the mixture produced intheqnixer will be increased, as a result of the' heating. .The upwardmovement of the escaping gases will assist in drawing air throughtheinlet openings 27' so the flame of the mantles will be served by astrong stream'of fresh air, directed by the sleeve 31 to the immediate.zone of combustion or to the lower part of the mantles. It is thus seenthat the escaping heat and gases are utilized to stimulate the flow offresh air to the Bunsen mixer. and to the mantles di rectly. l he resultof this arrangement is that a remarkably high degree of brilliancy isproduced by the heated mantles.

Photometrical' tests have established the fact that the im roved lampwill'give from sixty to a 'hun red per cent. more candle power ofillumination than the best of the ordinary incandescent gas mantle lampsin current use, comparing lamps of equal mantles, while with a groundglass globe a very soft and pleasing light is produced.

In order to dismantle the lam the globe 28 is first removed and theholding arms 5 are disengaged from the latches 3, and the key 19 removedfrom the socketed end of the valve stem 18. When this has been done theentire cylinder can be moved downwardly from the pipe 11, and anyadjustment or change desired can be effected. The man midway of thecylinder ends burners having mantles depending from the mixer, and anair inlet preheating tube of smaller diameter than the cylinder providedwith a contracted lower end secured to the mixer and a flared upper endprojecting above the upper end of the cylinder.

2. In combination, a cylinder having open ends, a supply pipe withinth'e cylinder, a

Bunsen mixer on the lower end of the supply pipe and above thelower endof the cylinder, a mantle holding device connected with the mixer, anair intake preheating tube connected with the mixer, mantles on theholding device depending below the cylinder, a sleeve on the cylinderdepending below the mantles, and an air inlet device secured to thecylinder above the sleeve.

3. In combination, a cylinder having open ends, a supply pipe within thecylinder, a mixer on-the supply pipe, holding arms hav ings'ocketediends on the mixer, and latches on the cylinder having pinsadapted to fit into the socketed ends of the holding arms for holdingsaid arms in place thereon.

4.. In combination, a cylinder having open ends, a supply pipe withinthe cylinder, a mixer connected with the supply pipe, mantles dependingfrom the mixer, and an air inlet preheating tube having a contractedlower end and a flared upper end within the cylinder with saidlower endsecured to the mixer and said upper end projecting above the cylinder.

5. In combination, a supplypipe, a mixer on the'lower endof the supplypipe, a valve with a flared upper end extending above and over themixer, a mantle holding device supported on the lower end of the mixer,arms extending laterally of the holding de- 5 vice, said arms havingtheir ends socketed a cylinder of considerably larger diameter than thepreheating tube surrounding said tube, latches on-the cylinder engagingthe socketed ends of the arms of the holding de- 10 vice, mantles on theholding device, a sleeve on the lower end of the cylinder, and a globesupported on the cylinder surrounding the mantles.

in testimony whereof I zn'inf my signature in presence of two Witnesses.

GEORGE 'WEDDERBURN.

Witnesses I p EDWIN B. SALISBURY, N. ABRAMsON.

